Roof or floor drain



1935- A. SOMMERFELD ROOF OR FLOOR DRAIN Abraham Jammerfeld BY m -Wv w;

ATTOR N EY INVENTOR Filed Jan. 22, 195

Patented Jan. 22, 1935 4 509E IQEFLQQB- Basis a 'lA braha'm sommerfeld,NeviXorkQNi'Y. Q 7 h rli afiqn imuw- 122 1934. sa ety N M v I H I rz olp s. wriapsiy "present 'iinventionlrelates "roof or floor drains,iand@aims.=toi.devise devices. of thegeneral character -specified, which i are simple in construe!- tion,=x;'easy and economical-Etc: fabricate, assemble "a and install, and which are admirably adapted'zrtc eliminate'icertaiiii disidvanta'g'es present in similar articles, which disadvantages will hereinafter be more specifically referred to.

In the accompanying specification I shall describe, and in the accompanying drawing show, the illustrative embodiment of the present invention. It is however, to be clearly understood that I do not wish to be limited tothe exact con struction described or shown herein for the purposes of illustration only.

Before describing my invention in detail, it may be desirable briefly to refer to the prior art in the field to which the present invention relates,

the disadvantages thereof, and the manner in which the present invention overcomes these disadvantages.

Roof or floor drains at present on the market are, for the most part made of cast metal and due to the changes in the temperature to which such devices are normally exposed, it has been found that such drains crack, for the reason that no provision is made for the expansion and. contraction of the metal. I have further found that due to the use of rivets, screws, bolts and clamps and other means of connection used during the assembling and installation of the drains, unnecessary strains are put upon the device with the result that this too leads to cracking. Furthermore the use of several individual elements joined together to make up an entire drain, permits leakage. I

The drains of the present invention overcome these disadvantages in that provision has been made for permitting expansion and contraction of the metal; the device is substantially unitary in construction so that no unnecessarystrains are placed upon it during assembly or installation; and in view of the omission of joints, the danger of leakage has been eliminated.

In the annexed drawing, Fig. 1 is a top view of the roof or fioor drain of the present invention, having a portion of the grate broken away to show the inner construction.

Fig. 2 is a partially side elevational, partially vertical sectional view of the roof or floor drain of the present invention showing the manner in which the same is assembled in a floor or roof.

Referring now more in detail to the aforesaid illustrative embodiment of the present invention, and with particular reference to the drawing illustrating-:the. same, the numeral 10 generally designates-a2 roof, the upper'surface of which is coveredwith; avxwaterproofing material 11. on

which rests :gravei .512; orqanyzothersfinishins "ma:

terial. The roof is provided with-tan .ope'ning'il3 into whichaiscsetsthez'imainrbodywpcrtionscf the drain of the present invention. Such main body portion may be made of sheet metal, the walls of which are provided with a multiplicity of circular convolutions which are adapted, as will be readily understood by those skilled in the art to which the present invention relates, to fold and unfold, as the metal of which the body is made expands and contracts due to increases or decreases of temperature.

The'upper edge or rim of the body is formed into a flange 16, known as the drain flashing, which flashing rests between the layers of the waterproofing 11. Thus the drain is anchored at the top thereof. Wedged in the uppermost portion of the body is a rim 1'7 known as a gravel stop, the same being provided with a plurality of weep holes 18 to permit under-surface drainage from the gravel 12.

The inner surface of the gravel stop 1'7 is provided with a plurality of lugs 19 with which there are adapted to cooperatenotches 20 formed in the rim 21 of the dome-like grate 22, the arrangement being such that the grate becomes locked in place when given a slight turn so as to rotate the notches 20 a short distance beyond the lugs 19.

Integrally formed at the lower end of the bowl 14 is a tubular member 23, the lower end of which is'fitted into the upper member 24 of a coupling 25. The upper member 24 of this coupling is adapted to cooperate with the lower member 26 which is fixed to the drain pipe proper 27.

Afiixed within the bowl 14 asby its lower portion 28, fitted in the tube 23 is a strainer 29 which strainer is provided with a multiplicity of openings 30, the purpose of which strainer is to hold back any solid matter that may find its way through the grate 22 and into the bowl 14 and yet permitting the passage of fluid matter.

It can be seen from the foregoing that although the drain is fixed at its upper and lower ends, changes in temperature, bringing about expansion or contraction of the metal, will not result in cracking for the reason that the convolutions 15 can take up any such changes in the size of the device. It will also be seen that in view of the elimination of bolts, screws, etc., no strain is brought to bear upon any portion of the device of cracking has been eliminated, and finally it will be noted that the leakage has been eliminated in view of the lack of joints. I

This completes the description of the aforesaid illustrative embodiment of the roof or floor drains member being provided with means to allow for the expansion and contraction thereof, I 5 2. As an article of manufacture, a drain having 20 said main body member.

. '3. As an article ofmanufacture, a .drain' having a unitary main' body member,"said mainbody member being provided, in'the bowl portion there= of, with "mea'ns't'o allow. for the expansionand 25 contraction thereof. f 4. As an article'of manufacture, a drain having a main body member, said main body member being provided with means to allow for the expansion and contraction thereof.

5. As an article of manufacture, a drain having a main body member, said main body member being provided with means to allow for the expansion and contraction thereof, said means consisting of convolutions in the bowl portion of said main body member.

6. Asan article ofmanufacture, a drain having a main body-member, said 'ma'inibo'd'y member being provided, in the bowl portion thereof, with means toallow for the expansion and contraction thereof.

'7: As""an "article of manufacture, a drain coma unitary main body member,,:;'sai 'dzimain-,.bodyi member being provided with means to allow for the expansion and contraction thereof,said means consisting of convolutions in the bowlportion; ofg

prising:-;a;main.-body member, provided with a. series of convolutions to allow for expansion and contrac'tion,a gravel stop affixed to said main body-member, said gravel stop being provided with a multiplicity of weep holes, a grate cooperable with said gravelistop; andza'straine'r aflixed within the mainbody member of said drain, said strainer being providedwith openingstopermit. the free passage of'liquids' and-obstruct the;.passage of solids.

1 'ABRAHAMLSOIVHVLERFELD... 

